(carbohydrate) An aldopentose that occurs most often in polysaccharides such as hemicellulose and pectin.
(carbohydrate) A polysaccharide that is mostly a polymer of arabinose
A sugar of the composition C5H10O5, obtained from cherry gum by boiling it with dilute sulphuric acid.
Arabinose is an aldopentose – a monosaccharide containing five carbon atoms, and including an aldehyde (CHO) functional group. For biosynthetic reasons, most saccharides are almost always more abundant in nature as the -form, or structurally analogous to D-glyceraldehyde.